发明名称 |
SECOND ORDER LOOP FILTER AND MULTI-ORDER DELTA SIGMA MODULATOR INCLUDING THE SAME |
摘要 |
Provided is a second order loop filter (LF). The second order LF includes: an operational amplifier including a first input, a second input receiving a differential input of the first input, and an output; an inverter inverting a signal output from the output of the operational amplifier to output an inverted signal; a first resistor connected to between the first input and a first node; a second resistor connected to between the output of the operational amplifier and the first node; a third resistor connected to between the first input and an input signal; a first capacitor connected to between the second input and the first node; a second capacitor connected to between the output of the operational amplifier and an output of the inverter; and a third capacitor connected to between the output and the first input of the operational amplifier, wherein the second input is connected to a ground voltage. |
申请公布号 |
US2015229292(A1) |
申请公布日期 |
2015.08.13 |
申请号 |
US201514617705 |
申请日期 |
2015.02.09 |
申请人 |
Electronics and Telecommunications Research Institute |
发明人 |
CHO Young Kyun;JUNG Jae Ho;LEE Kwangchun |
分类号 |
H03H11/04;H03M3/00 |
主分类号 |
H03H11/04 |
代理机构 |
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代理人 |
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主权项 |
1. A second order loop filter comprising:
an operational amplifier comprising a first input, a second input receiving a differential input of the first input, and an output; an inverter inverting a signal output from the output of the operational amplifier to output an inverted signal; a first resistor connected to between the first input and a first node; a second resistor connected to between the output of the operational amplifier and the first node; a third resistor connected to between the first input and an input signal; a first capacitor connected to between the second input and the first node; a second capacitor connected to between the output of the operational amplifier and an output of the inverter; and a third capacitor connected to between the output and the first input of the operational amplifier, wherein the second input is connected to a ground voltage. |
地址 |
Daejeon KR |